chris, wonderful work! a simple solution to this may be to just add a driveshaft cover of some sorts. they are mandatory today, don't know about back then. although, i would find it hard to believe the nhra would allow an exposed driveshaft running between a drivers legs. where anything could wrap around it as it rotated.
so, got off my lazy butt and looked up the rule in the 1974 rulebook.
"a full 360 degree 1/8 steel driveline cover extending the full length of the driveshaft from the rear of the transmission case or tramsmission adapter shield to the rear end center section is acceptable and highly recommended. all funny cars using couplers must have a loop as described above - 360 degree- in the area of the drivers seat."
maybe this will give you something to work with. hope it helps.
Edited by comp1839, 15 June 2013 - 04:07 AM.